Displaying 51 - 100 out of 517 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Eragrostis pectinacea (Michx.) Nees | A. Hayden 41 | 20 Aug 1934 | United States of America | — | Palo Alto, Highland Twp. Sec.… | — | 1699581 |
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| Eragrostis pectinacea (Michx.) Nees | A. Hayden 109 | 08 Aug 1935 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 1699583 |
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| Eragrostis pilosa (L.) P.Beauv. | A. Hayden s.n. | 17 Aug 1948 | United States of America | Iowa | Palo Alto Co. Highland Twp.,… | — | 1699956 |
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| Eragrostis spectabilis (Pursh) Steud. | A. Hayden 8158 | 19 Sep 1940 | United States of America | Iowa | Fremont Co. Waubonsie State Park,… | — | 1700770 |
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| Eragrostis spectabilis (Pursh) Steud. | A. Hayden 10930 | 01 Oct 1938 | United States of America | Iowa | Davis Co. One mile west… | — | 1700796 |
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| Astragalus canadensis L. var. canadensis | A. Hayden 6004 | 14 Aug 1937 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 01247128 |
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| Astragalus canadensis L. var. canadensis | A. Hayden 9917 | 10 Aug 1940 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 01247129 |
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| Astragalus crassicarpus Nutt. var. crassicarpus | A. Hayden 4031 | 15 May 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 01247988 |
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| Astragalus distortus Torr. & A.Gray var. distortus | A. Hayden 9346 | 11 May 1939 | United States of America | Iowa | Wapello Co. Washington Twp. About… | — | 01248545 |
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| Dalea candida Willd. var. candida | A. Hayden 4033 | 26 Jul 1934 | United States of America | Iowa | Palo Alto Co. Highland Twp.,… | — | 01073600 |
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| Dalea enneandra Nutt. | A. Hayden s.n. | 14 Jul 1926 | United States of America | Iowa | Council Bluffs | — | 01259266 |
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| Dalea enneandra Nutt. | A. Hayden 11324 | s.d. | United States of America | Iowa | Woodbury Co. Sioux City twp.,… | — | 01259277 |
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| Dalea leporina (Aiton) Hemsl. | A. Hayden 6007 | 02 Sep 1937 | United States of America | Iowa | Clay Co. Freeman Twp., Sec.… | — | 01270140 |
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| Dalea purpurea Vent. var. purpurea | A. Hayden 4038 | 30 Jun 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 01277486 |
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| Chamaecrista fasciculata (Michx.) Greene | A. Hayden s.n. | 24 Jul 1926 | United States of America | Iowa | Mount Ayr | — | 01453775 |
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| Carya glabra (Mill.) Sweet | A. Hayden 2015a | 18 Oct 1936 | United States of America | Iowa | Story Co. Milford Twp., Sec.… | — | 1473272 |
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| Carya glabra (Mill.) Sweet | A. Hayden 1096 | 10 Oct 1936 | United States of America | Iowa | Story Co. West side of… | — | 1473334 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 2010 | 17 Oct 1936 | United States of America | Iowa | Story Co. Seven miles n.e.… | — | 1484908 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 2010a | 07 May 1937 | United States of America | Iowa | Story; Milford; Seven miles n.e.… | — | 1484910 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 1090a | 27 May 1937 | United States of America | Iowa | Story Co. along the road,… | — | 1484911 |
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| Carya ovata (Mill.) K.Koch | A. Hayden 2012 | 17 Oct 1936 | United States of America | Iowa | Story Co. Seven miles n.e.… | — | 1484953 |
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| Carya tomentosa (Poir.) Nutt. | A. Hayden 8402 | 16 Oct 1941 | United States of America | Iowa | Davis Co. Perry Twp., Sec.… | — | 1485745 |
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| Juglans nigra L. | A. Hayden 848 | 12 Oct 1936 | United States of America | Iowa | Palo Alto Co. Along basal… | — | 1486417 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 10941 | 26 Jun 1937 | United States of America | Iowa | Davis Co. Lick Creek Twp.,… | — | 1555878 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 9269 | s.d. | United States of America | Iowa | Davis Co. Lick Creek Twp.,… | — | 1555882 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 8147 | 19 Jun 1940 | United States of America | Iowa | Clayton Co. Giard Twp. Sec.… | — | 1555883 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 7064 | 21 Jun 1937 | United States of America | Iowa | Lyon Co. Sioux Twp. Gitche… | — | 1555887 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | A. Hayden 612 | 26 Jun 1936 | United States of America | Iowa | Palo Alto Co. Highland Twp.,… | — | 1555890 |
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| Agrostis perennans (Walter) Tuck. | A. Hayden 8140 | 14 Sep 1940 | United States of America | Iowa | Clay Co. Peterson Twp., Sec.… | — | 1557087 |
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| Agrostis perennans (Walter) Tuck. | A. Hayden 42 | 26 Jul 1934 | United States of America | — | Emmet, Emmet twp. Sec. 18.… | — | 1557089 |
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| Agrostis stolonifera L. | A. Hayden 265 | 19 Jul 1935 | United States of America | Iowa | Clay Co. Outlet Lost Island… | — | 1533170 |
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| Agrostis stolonifera L. | A. Hayden 9287 | 10 Jul 1939 | United States of America | Iowa | Clay Co. Pickerel Run. | — | 1533171 |
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| Alopecurus aequalis Sobol. | A. Hayden 241 | 30 May 1936 | United States of America | Iowa | Clay Co. Lake Twp. Sec.… | — | 1637661 |
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| Alopecurus carolinianus Walter | A. Hayden 7098 | 22 Jun 1937 | United States of America | Iowa | Lyon Co. Sioux Twp. Gitche… | — | 1637929 |
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| Andropogon gerardii Vitman | A. Hayden 1 | 27 Aug 1934 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1639246 |
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| Bouteloua curtipendula (Michx.) Torr. | A. Hayden 7080 | 05 Sep 1937 | United States of America | Iowa | Cherokee Co. Pilot Twp., Sec.… | — | 1642653 |
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| Bouteloua gracilis (Kunth) Lag. ex Griffiths | A. Hayden s.n. | 14 Aug 1934 | United States of America | Iowa | Clay Co. Lake Twp., Sec.… | — | 1643386 |
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| Bouteloua gracilis (Kunth) Lag. ex Griffiths | A. Hayden 88 | 08 Jul 1935 | United States of America | Iowa | Dewey's Pasture; gravelly hilltop; Lake… | — | 1643389 |
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| Bouteloua hirsuta Lag. | A. Hayden 3130 | 12 Aug 1943 | United States of America | Iowa | Waterman Twp., Sec. 24; forming… | — | 1643904 |
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| Bouteloua hirsuta Lag. | A. Hayden 7081 | 13 Sep 1937 | United States of America | Iowa | Union City Twp., Sec. 33;… | — | 1643908 |
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| Bouteloua hirsuta Lag. | A. Hayden 765 | 28 Aug 1935 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1643909 |
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| Bromus inermis Leyss. | A. Hayden 8175 | 07 Jul 1940 | United States of America | Iowa | Roadside, Algona, Cresco Twp., Sec.… | — | 1636300 |
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| Bromus inermis Leyss. | A. Hayden 28 | 26 Jun 1934 | United States of America | Iowa | Emmet Co. Estherville twp., Sec.… | — | 1636304 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | A. Hayden 93 | 12 Jul 1935 | United States of America | Iowa | Palo Alto Co. E. Lost… | — | 1645836 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | A. Hayden 611 | 23 Jun 1936 | United States of America | Iowa | Clay Co. Outlet of Lost… | — | 1645837 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | A. Hayden 92 | 11 Jul 1935 | United States of America | Iowa | Palo Alto Co. Highland Twp.… | — | 1645845 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | A. Hayden 90 | 10 Jul 1935 | United States of America | Iowa | Palo Alto Co. Hansen's farm,… | — | 1645848 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | A. Hayden 97 | 14 Jun 1935 | United States of America | Iowa | Palo Alto Co. Lost Island… | — | 1645849 |
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| Calamagrostis neglecta subsp. inexpansa (A.Gray) Tzvelev | A. Hayden 9289 | 20 Jul 1939 | United States of America | Iowa | Clay Co. In water at… | — | 1646812 |
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| Calamagrostis neglecta subsp. inexpansa (A.Gray) Tzvelev | A. Hayden 8007 | 11 Jul 1937 | United States of America | Iowa | Palo Alto Co. Five miles… | — | 1646871 |
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